In Monroe County, 46.1 percent of adults ages 18 and older were immunized in 2016, according to data from Common Ground Health. Ontario (45.7 percent), Livingston (44.6 percent) and Seneca (44.2 percent) also all were better than the Finger Lakes average. Yates County had the lowest, at 29.3 percent.

The 2017-18 flu season in Monroe County was the most widespread in recent years. The 19 deaths were more than in each of the previous two seasons, and the 1,327 hospitalizations were more than the previous two seasons combined. The county had 7,357 confirmed cases, but the total was higher because many people with flu do not see a doctor and many health providers do not test every person with symptoms.

Flu is tracked from October through April. Activity locally tends to peak after the first of the year, but the vaccine for the 2018-19 season already is available. Wegmans announced on Friday that all its pharmacies have vaccine for children and adults, including the high-dose for seniors and egg- and preservative-free options. The Centers for Disease Control and Prevention recommends the flu shot for anyone 6 months and older.